JPH0370798A - Oil pressing and device therefor - Google Patents

Abstract

PURPOSE:To improve oil pressing efficiency and workability by reducing volume of fat and oil raw material stored in a container by pressurization, additionally storing a fat and oil raw material, pressurizing, repeating these processes several times, pressing and collecting an oil. CONSTITUTION:A fat and oil raw material is stored in a storage container of fat and oil raw material, pressed by lower pressure than given pressurizing force and volume of the stored fat and oil raw material is reduced. Then a new fat and oil raw material is additionally stored without removing the raw material and further the raw material is pressed by lower pressure than the given pressurizing force to lessen the volume. These processes are repeated several times and then the raw material is pressed by the given pressure to collect an oil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an oil extraction method and apparatus for extracting oil from oil and fat raw materials.

[Prior Art] As a device for extracting fats and oils contained in fats and oils raw materials such as rice bran and soybeans, there is known an oil extraction device that extracts fats and oils by compressing these raw materials.

This oil extraction device includes a cage as a storage container for oil and fat raw materials,
It is equipped with a vertical head (push metal) that can be inserted into this cage. There are two types of cages: the so-called British type, in which cage bars are arranged vertically in parallel and tightened with iron rings on the outside, and the so-called German type, in which the cage is made of iron and has a cylindrical shape with numerous small holes formed around its outer circumference. Oil and fat materials such as rice bran and soybeans are stored inside.

On the other hand, a pressurizing device operated by water pressure or oil pressure is connected to the vertical head (or the mounting plate on which the cage is placed), and by operating this pressurizing device, the cage and vertical head are connected. Relative movement is possible.

When extracting oil, when the oil and fat raw materials are stored in the cage and the pressurizing device is activated, the vertical head is fitted into the cage.
The oil and fat raw materials are squeezed by vertical heads in the cage, thereby extracting the oil and fat contained therein.

Oil extraction equipment that extracts oil using this type of compression method produces better quality of the extracted crude oil than the solvent extraction method (equipment) that extracts oil by adding a solvent to the oil raw material, and is less dangerous because it does not use solvents. It has the advantage of being less sensitive.

[Problems to be Solved by the Invention] However, such conventional press-type oil extraction devices require high pressure and long periods of time (e.g. 100-30
It was necessary to apply pressure at a compression force of 0 kg-f/cm'' for 2 to 3 hours, which had the disadvantage of poor oil extraction efficiency.

In addition, unlike liquids, powdered materials such as rice bran and sesame that are used as raw materials for fats and oils are stored in cages and when pressurized, the pressure from the vertical head is not evenly transmitted, and the degree of squeezing is uneven. It was uniform. In other words, the oil and fat materials located in the center of the cage are less likely to be subjected to pressure by the vertical head than the oil and fat materials located on the side walls of the cage, and therefore require a long time to be sufficiently compressed. There was a problem that the efficiency of oil extraction was poor in the oil and fat raw materials located in the center of the area.

In this case, in order to improve the efficiency of oil extraction, the oil and fat raw material is compressed in advance with a pressure smaller than the original pressure to reduce its volume (so-called temporary tightening), and then this reduced volume is compressed. After stacking multiple oil and fat raw materials and storing them in a cage, they are compressed using the original pressure (so-called final tightening).
An oil extraction method for extracting oil has been proposed.

According to this method, compared to the method of extracting oil by simply squeezing the fat raw material stored in the cage in one pressurizing process, it is possible to extract more fats and oils contained in the fat raw material in a short time. , good oil extraction efficiency.

However, in the conventional oil extraction apparatus used in this oil extraction method that performs temporary tightening and final tightening, the cage and pressurizing device for temporary tightening and the cage and pressurizing device for final tightening were each configured separately. During oil extraction, it is necessary to take out the temporarily tightened fat and oil raw material from the temporary tightening cage and replace it with the final tightening cage, which has the disadvantage that the workability of oil extraction is extremely poor.

The present invention takes the above-mentioned facts into account, and aims to provide an oil extraction method and an apparatus therefor that have good oil extraction efficiency and further improve workability.

[Means for Solving the Problems] The oil extraction method of the invention according to claim (1) is an oil extraction method for extracting the oil and fat contained in the oil and fat raw material by compressing the oil and fat raw material with a predetermined pressure, and the oil and fat raw material storage container is The oil and fat raw material is stored in the container, the volume of the stored oil and fat raw material is reduced by compressing it with a pressure smaller than the predetermined pressure, and then the oil and fat raw material is stored without removing the reduced fat and oil raw material. A new oil and fat raw material is added and stored in the container, and the volume of the newly added and stored oil and fat raw material is reduced by compressing with a pressure smaller than the predetermined pressure, and the above steps are performed. The method is characterized in that after repeating this a plurality of times, the oil is extracted by squeezing with the predetermined pressure.

The oil extraction method of the invention according to claim <2) uses a storage container that stores the oil and fat raw materials inside, and a vertical head that can be fitted into the storage container along the axis line, and presses the oil and fat raw materials. An oil extraction method for extracting oil and fat contained therein, the method comprises arranging an axial member along an axis inside the storage container to form a portion where the oil and fat raw materials are not stored, and forming a portion of the storage container other than the axial member. It is characterized in that it stores oil and fat raw materials, and squeezes the oil and fat raw materials by fitting the vertical head to extract oil.

The oil extraction method according to the invention according to claim (3) is the oil extraction method according to claim (2), wherein oil and fat collection means are provided on the inner peripheral wall of the storage container and the outer peripheral wall of the axis member, and the oil and fat are extracted from these parts. It is characterized by extracting the oils and fats that have been removed.

The oil extraction method of the invention according to claim (4) is defined in claim (1),
In the oil extraction method according to claim (2) or claim (3), a hot air supply means is disposed outside the storage container that stores the oil and fat raw materials, and hot air is blown during the oil extraction to extract the oil. It is characterized by

The oil extraction device of the invention according to claim (5) is an oil extraction device for extracting the oil and fat contained in the oil and fat raw material by compressing the oil and fat raw material, and includes a storage container that stores the oil and fat raw material, and a storage container that is fitted into the storage container and extracts the oil and fat that is contained in the oil and fat raw material. It is characterized by comprising a pressurizing means that is capable of compressing the raw material and that allows new fat raw materials to be added and stored in the storage container without removing the raw fat raw materials after squeezing the raw materials. There is.

The oil extraction device of the invention according to claim (6) includes: a storage container that stores an oil or fat raw material therein; an axial line member that is arranged along an axis inside the storage container and forms a part in which the oil or fat raw material is not stored; The apparatus includes a pressurizing means that fits into the storage container along the axis line and compresses the fat and oil raw material stored in a portion of the storage container other than the axial member.

The oil extraction device according to the invention according to claim (7) is the oil extraction device according to claim (6), wherein the oil extraction device is provided on the inner peripheral wall of the storage container and the outer peripheral wall of the axis line member and extracts the oil and fat squeezed from these parts. It is characterized by being equipped with a guiding oil and fat recovery means.

The oil extraction device of the invention according to claim (8) is defined by claim (5),
The oil extraction apparatus according to claim (6) or claim (7) further comprises a hot air supply means that is arranged outside the storage container that stores the oil and fat raw materials and is capable of blowing hot air during compression. It is a feature.

[Function] In the oil extraction method according to claim (1), a plurality of oil and fat raw materials whose volumes have been reduced through a plurality of preliminary pressurization steps (so-called temporary tightening) are stored in a single oil and fat raw material storage container. They are stacked in multiple tiers and stored inside. Next, the oil is extracted by squeezing (so-called final tightening) with a predetermined pressure.

Therefore, compared to the method of extracting oil by simply squeezing the oil and fat raw materials stored in the cage in one pressurizing process, more oil and fat contained in the oil and fat raw materials can be extracted in a short time, and the oil extraction is more efficient. is good. In addition, since oil and fat raw materials are processed in the same (single) oil and fat raw material storage container regardless of whether they are in the temporary tightening process or the final tightening process, each time the oil and fat raw materials are extracted, the oil and fat raw materials after temporary tightening are transferred from the temporary tightening storage container. There is no need to take out the oil and replace it in the final tightening storage container, improving the work efficiency of oil extraction.

In the oil extraction method according to claim (2), since the oil and fat raw materials are not present in the central part of the storage container, that is, in the area where the pressure due to the perpendicular head is difficult to apply and a long time is required for sufficient compression, the storage container The oil and fat raw materials that are housed and pressurized are sufficiently squeezed in a short time, improving the efficiency of oil extraction.

In the oil extraction method described in claim (3), oil is collected from both the inner peripheral wall of the storage container and the outer peripheral wall of the shaft member by the oil collecting means. Therefore, for example, oil can be extracted in a shorter time than in the case of simply extracting fats and oils squeezed from the outer peripheral wall of the storage container, and the efficiency of oil extraction is improved.

In the oil extraction method according to claim (4), the temperature of the storage container that stores the oil and fat raw materials is raised during the extraction. Therefore, the efficiency of oil extraction is improved compared to the case where oil is extracted at room temperature.

In the oil extraction device according to claim (5), a plurality of oil and fat raw materials whose volumes have been reduced through a plurality of preliminary pressurization steps (so-called temporary tightening) by the pressurizing means are stored in a single oil and fat raw material storage. They are stacked in multiple stages and stored in a container.In this case, the pressurizing means is capable of adding a new fat and oil raw material after squeezing the fat and oil raw material and storing it in the storage container without removing the fat and oil raw material. Therefore, there is no need to take out the oil and fat raw material from the storage container and replace it each time it is temporarily tightened.

Next, the oil is extracted by squeezing (so-called final tightening) with a predetermined pressure.

Therefore, compared to the case where the oil and fat raw materials stored in the cage are simply squeezed and extracted in one pressurizing process, more oil and fat contained in the oil and fat raw materials can be extracted in a short time, making the oil extraction more efficient. is good. In addition, since oil and fat raw materials are processed in the same (single) oil and fat raw material storage container regardless of whether they are in the temporary tightening process or the final tightening process, each time the oil and fat raw materials are extracted, the oil and fat raw materials after temporary tightening are transferred from the temporary tightening storage container. There is no need to take out the oil and replace it in the final tightening storage container, improving the work efficiency of oil extraction.

In the oil extraction device according to claim (6), the portion where the oil and fat raw materials are not stored along the axis inside the storage container is formed as a bath bottom by the axis member.This portion is difficult to apply pressure due to the vertical head and can be sufficiently squeezed. This is a part that requires a long time to extract, and since there is no oil or fat raw material in this part, the oil or fat raw material that is stored in the storage container and pressurized is sufficiently squeezed in a short time, resulting in high oil extraction efficiency. Become.

In the oil extraction device according to claim (7), the oil and fat recovery means guides and extracts the oil from both the inner circumferential wall of the storage container and the outer circumferential wall of the shaft member.

Therefore, for example, oil can be extracted in a shorter time than in the case of simply extracting fats and oils squeezed from the outer peripheral wall of the storage container, and the efficiency of oil extraction is improved.

In the oil extraction apparatus according to claim (8), the temperature of the storage container that stores the oil and fat raw materials is raised by the hot air supply means during compression. Therefore, the efficiency of oil extraction is improved compared to the case where oil is extracted at room temperature.

[Embodiment FIG. 1 shows an overall perspective view of an oil extraction device 10 according to an embodiment of the present invention, and FIGS. 2 and 3 show an oil extraction device I.
An exploded perspective view of essential parts of O is shown.

In the oil extraction device 10, parts used only for the preliminary pressurization process (so-called temporary tightening, hereinafter referred to as temporary tightening) of oil and fat raw materials,
There are parts that are used only for the original compression of oil and fat raw materials (so-called final tightening, hereinafter referred to as final tightening), and parts that are commonly used in both processes, and these distinctions will be clearly explained below.

Note that FIG. 2 shows parts used during temporary tightening, and FIG. 3 shows parts used during final tightening. Therefore, parts commonly used in both processes are shown redundantly.

In the oil extraction device 10, a substrate 14 is fixed on a base 12, and a hydraulic cylinder 16 constituting a pressurizing means is further installed.
is located. The hydraulic cylinder 16 is installed as a so-called Rondo side flange type cylinder in which a flange portion 18 is fixed to the base plate 14 and the axis is arranged in the vertical direction. It has become. A male threaded portion 22 is formed at the tip of the piston rod 20 . This hydraulic cylinder 16 (piston rod 20) is a basic component commonly used for temporary tightening and final tightening.

A cylinder base 24 is fixed directly above the substrate 14. The cylinder base 24 is made of a thick-walled plate material with a through hole 26 formed in the center.
It faces the piston rod 20). An outer cylinder 28 serving as an oil and fat raw material storage container is fixed at a position corresponding to the through hole 26 on the cylinder base 24. This outer cylinder 28
It is also a basic part commonly used for temporary tightening and final tightening.

The outer cylinder 28 has a thick-walled cylindrical shape (in this embodiment, the height is 500 mm, the inner diameter is about 250 mm, and the outer diameter is about 320 mm), has pressure resistance, and has a wall at both ends in the axial direction. An upper flange portion 30 and a lower flange portion 32 are formed respectively. The lower flange portion 32 of the outer cylinder 28 is placed on the cylinder base 24 and is fixed by bolts 34 in a tightly attached state.

There is no space between the lower flange portion 32 and the cylinder base 24.
A ring 35 is arranged to ensure sealing performance.

A lower receiving disk 36 is arranged inside the outer cylinder 28. The lower receiving disk 36 is a thick disk having pressure resistance, and a rubber ring 37 is attached to the upper surface. The lower receiving disc 36 is formed with an outer diameter corresponding to the inner diameter of the outer cylinder 28 and is movable in the axial direction within the outer cylinder 28, and is normally located at the lower end of the outer cylinder 28 and located at the cylinder base. 24 through holes 2
6, that is, the through hole 26 is closed. A through hole 38 is formed in the center of the lower receiving disk 36, through which the piston rod 20 of the hydraulic cylinder 16 can be inserted. therefore,
When the piston rod 20 is inserted through the through hole 38 of the lower receiving disc 36, the outer cylinder 28, the lower receiving disc 36, and the piston rod 20 form a doughnut-shaped oil storage part inside the outer cylinder 28. , it becomes possible to store oil and fat raw materials. This lower receiving disc 36 is also a basic component commonly used for temporary tightening and final tightening.

A plurality of vertical grooves 40 constituting oil and fat collection means are formed in the inner circumferential wall of the outer cylinder 28.
There is an oil recovery hole 42 in the cylinder base 24 corresponding to the edge.
is formed. A recovery hose (not shown) is connected to the oil recovery hole 42 . Furthermore, an outer cylinder filter 44 constituting oil and fat recovery means is arranged on the inner periphery of the outer cylinder 28. The outer cylinder filter 44 is a sintered filter (in this embodiment, a 300 μm mesh) and is disposed in close contact with the inner circumferential wall of the outer cylinder 28, and allows only oil and fat components contained in the oil and fat raw materials to pass therethrough.

The fats and oils that have passed through the outer cylinder filter 44 are sequentially guided downward by the vertical grooves 40 and can be recovered from the oil recovery hole 42.

A presser ring 46 is arranged at the upper end of the outer cylinder 28 in correspondence with the upper end of the outer cylinder filter 44 . This retainer ring 46 always comes into contact with the outer cylinder filter 44 to prevent the outer cylinder filter 44 from moving inadvertently and to hold it in a predetermined position.

The piston rod 20 is extended and its tip end is connected to the lower receiving disk 36.
In the state located above, the temporary tightening pusher 48 can be connected to the tip of the piston rod 20 (see FIG. 2). The temporary tightening button shear 48 has a cylindrical body 50 and a disc-shaped head 5 formed at the upper end of this body 50.
2 to form a T-shaped cross section. A female threaded portion 54 corresponding to the male threaded portion 22 formed at the tip of the piston rod 20 is formed in the body portion 50, and this female threaded portion 54 is screwed into the male threaded portion 22 to tighten the temporary tightening pusher 4.
8 is connected to the piston rod 20. The outer diameter of the head 52 is formed to correspond to the inner diameter of the outer cylinder 28 (outer cylinder filter 44), so that the temporary tightening button shear 48 connected to the piston rod 20 is attached to the piston rod 20. It is movable within the outer cylinder 28. Further, a rubber ring 55 is attached to the lower surface of the head 52. This temporary tightening button shear 48 is a component used only for temporary tightening.

The piston rod 20 is retracted and its tip becomes the lower receiving disk 36.
When the piston rod 2 is located lower than
A support plate 56 can be placed on the tip of the 0 (see Fig. 3).The support plate 56 is a thick disc-shaped and has pressure resistance, and its outer diameter is that of a through-hole. 26 and larger than the inner diameter of the through hole 38. Therefore, when the piston rod 20 extends with the support plate 56 placed on the tip of the piston rod 20, When the support plate 56 comes into contact with the lower surface of the lower receiving disc 36 and the piston rod 20 further extends, the lower receiving disc 36 is moved upwardly within the outer cylinder 28 together with the support plate 56. This support plate 56
is a part used only for final tightening.

When the support plate 56 is placed on the tip of the piston rod 20, the inner cylinder 58 can be placed on the support plate 56 (see FIG. 3). The inner cylinder 58 has a cylindrical shape within the thickness and has pressure resistance, and its outer diameter is equal to that of the lower receiving disk 36.
This corresponds to the inner diameter dimension of the through hole 38 formed in the center of the hole. Therefore, the inner cylinder 58 can be inserted through the through hole 38 similarly to the piston rod 20. That is, the inner cylinder 58
is located inside the outer cylinder 28 instead of the piston rod 20, and its lower end is placed on the support plate 56 (the tip of the piston rod 20) after passing through the through hole 38 of the lower receiving disk 36. It has become. Therefore, when the inner cylinder 58 is located inside the outer cylinder 28, inserted through the through hole 38 of the lower receiving disk 36, and placed on the support plate 56, the outer cylinder 28, the lower receiving disk 36, and the inner cylinder 58 forms a donut-shaped oil/fat storage section inside the outer cylinder 28, which can store the oil/fat raw material. This inner cylinder 58 is a component used only for final tightening.

A plurality of vertical grooves 60 constituting oil collecting means are formed in the outer peripheral wall of the inner cylinder 58, and oil collecting holes 62 are formed in the support plate 56 corresponding to the lower terminal edge of the vertical grooves 60. ing. A recovery hose (not shown) is also connected to this oil recovery hole 62.

Further, an inner cylinder filter 64 constituting oil and fat collecting means is arranged on the outer periphery of the inner cylinder 58. Inner cylinder filter 64
is a sintered filter and is arranged in close contact with the outer peripheral wall of the inner cylinder 58, and like the outer cylinder filter 44,
Only the oil and fat components contained in the oil and fat raw materials are allowed to permeate. The fats and oils that have passed through the inner cylinder filter 64 are sequentially guided downward by the vertical grooves 60 and can be recovered from the oil recovery hole 62.

A presser ring 66 is disposed at the upper end of the inner cylinder 58 in correspondence with the upper end of the inner cylinder filter 64 . This retainer ring 66 has the role of preventing the inner cylinder filter 64 from moving inadvertently and holding it at a predetermined position.

On the other hand, a final tightening cover 68 can be placed at the upper end of the outer cylinder 28 (see Fig. 3).The final tightening cover 68 has a thick disk shape and is pressure resistant. rubber ring 6
9 is attached.

This final tightening cover 68 is formed with an outer diameter dimension corresponding to the inner diameter dimension of the retaining ring 46, so that the final tightening cover 68 can be fitted into the retaining ring 46 at the upper end of the outer cylinder 28. It has become.

A through hole 70 is formed in the center of the final tightening cover 68. The through hole 70 is formed to have the same dimensions as the through hole 38 of the lower receiving disc 36, that is, to correspond to the outer diameter dimension of the inner cylinder 58 (inner cylinder filter 64).
) can be inserted. Therefore, the inner cylinder 58 is
After passing through the through hole 70 of this final tightening cover 68, the lower end portion is inserted through the through hole 38 of the lower receiving disc 36, and the support plate 56
The outer cylinder 2 is placed on the top (the tip of the piston rod 20).
This configuration is arranged inside the 8. This final cover 68
These are also parts used only for final tightening.

A cover retainer 72 is attached to the upper flange portion 30 of the outer cylinder 28 with bolts 74 and nuts 76. The cover holder 72 is mounted eccentrically, and its mounting position can be changed by rotating around the bolt 74. Here, as shown in FIG. 1, when the bolt 74 is set with the opposite end located on the inside of the outer cylinder 28, the lower surface of the cover presser 72 is held against the fully tightened cover 6.
8 and the upper ends of the retaining ring 46, and can restrict upward movement of these members.

The outer cylinder 28 having the above structure is covered with a hot air sheet 78 as a hot air supply means, as shown in FIG. The hot air sheet 78 is formed into a skirt shape, and its upper end portion is attached to the upper flange portion 30 of the outer cylinder 28 in close contact. A hot air hose 80 is connected to the lower end of the hot air sheet 78, and can supply hot air (for example, 30 to 60 degrees) generated from a hot air source such as a burner (not shown).

Next, the operation of this embodiment will be explained.

In the oil extraction device 10, since warm air is fed inside the hot air sheet 78, the outer cylinder 28 covered with the hot air sheet 78
is heated.

When extracting oil, first the oil and fat raw materials such as rice bran and soybeans are temporarily tightened. That is, the lower receiving disk 36 is disposed at the innermost lower end of the outer cylinder 28 (as shown in FIG.
is inserted, and a temporary tightening pusher 48 is connected to its tip. Thereafter, the oil and fat raw materials are stored in a donut-shaped oil and fat storage section inside the outer cylinder 28 by the outer cylinder 28, the lower receiving disk 36, and the piston rod 20 (as shown in FIG. 5).

Here, as shown in FIG. 6, the hydraulic cylinder 16 is operated to retract the piston rod 20 and temporarily tighten the button
8 is moved together with the piston rod 20 toward the lower receiving disk 36. By this movement of the temporary tightening pusher 48, the oil and fat raw material inside the outer cylinder 28 is under high pressure (for example, about 125 kg - f
7 cm2 compression force). Furthermore, this compressed state is maintained until the volume of the fat and oil raw material in the outer cylinder 28, that is, the height dimension becomes 1/3.

Next, the piston rod 20 is extended to the maximum extent, that is, the temporary tightening button 48 is made to protrude above the outer cylinder 28>, and a new oil and fat material is added without removing the oil and fat raw materials in the reduced outer cylinder 28. Oil and fat raw materials are additionally stored in the outer cylinder 28.

Furthermore, the hydraulic cylinder 16 is operated again to retract the piston rod 20, thereby reducing the volume of the newly added and stored oil and fat raw material.

After the above steps are repeated a plurality of times to fill the outer cylinder 28 with the fat and oil raw material, final tightening is performed.

In the final tightening, the temporary tightening pusher 48 connected to the piston rod 20 is removed, and the piston rod 20 is contracted to the maximum length so that its tip is located below the lower receiving disk 36. Here, a support plate 56 is placed on the tip of the piston rod 20, and a final tightening cover 6 is placed on the upper end of the outer cylinder 28, that is, the upper end of the stored oil and fat raw material.
8 (as shown in FIG. 7). Furthermore, the cover presser 72 is adjusted so that its end is located inside the outer tube 28 and comes into contact with the upper end portions of the final tightening cover 68 and the presser ring 46. This restricts the upward movement of the oil and fat raw materials stored in the final tightening cover 68 and the outer cylinder 28.

Next, the inner cylinder 58 is inserted into the through hole 70 of the final tightening cover 68, and is positioned inside the outer cylinder 28 (the stored oil and fat raw material) instead of the piston rod 20, and the lower end of the inner cylinder 58 is inserted into the lower end of the inner cylinder 58. It is inserted through the through hole 38 of the disk 36 and placed on the support plate 56 (the tip of the piston rod 20) (as shown in FIG. 8).

Here, as shown in FIG. 9, the hydraulic cylinder 16 is operated to extend the piston rod 20.

When the piston rod 20 extends, the support plate 56 comes into contact with the lower surface of the lower receiving disc 36, and the piston rod 20
When the support plate 56 is expanded, the lower receiving disk 36 and the inner tube 58 are moved upward within the outer tube 28 together with the support plate 56. in this case,
Since the upward movement of the final tightening cover 68 is restricted by the cover presser 72, the oil and fat raw material stored in the outer cylinder 28 after temporary tightening is under high pressure (for example, about 250 kg-f/c).
It is compressed with a compressive force of m'. Furthermore, this compressed state is maintained for about 1 hour.

As a result, the fats and oils contained in the fat and oil raw material pass through the outer cylinder filter 44 and the inner cylinder filter 64 and are squeezed out to the inner peripheral wall of the outer cylinder 28 and the outer peripheral wall of the inner cylinder 58, respectively. Furthermore, these squeezed out fats and oils are sequentially guided downward by the vertical grooves 40 and 60, respectively, and are recovered from the oil recovery holes 42 and 62.

In this way, in the oil extraction device IO, compared to the method of extracting oil by simply squeezing the fat and oil raw material stored in the storage container (cage) in one pressurizing process, the oil and fat contained in the fat and oil raw material can be extracted in a short time. More oil can be extracted and oil extraction efficiency is high. In addition, since the oil and fat raw materials are squeezed in a single outer cylinder 28 regardless of the temporary tightening process or the final tightening process, the oil and fat raw materials after temporary tightening are taken out from the temporary tightening storage container each time the oil is squeezed. There is no need to change to a storage container for tightening, and the work efficiency of oil extraction is improved.

In addition, in the oil extraction device 10, the piston rod 20 is disposed at the central portion of the outer cylinder 28, that is, at a location where it is difficult to apply pressure and requires a long time to fully squeeze the oil, during temporary tightening. In addition, at the time of final tightening, the inner cylinder 58 is arranged and no oil or fat raw material is present in either case, so the oil or fat raw material stored in the outer cylinder 28 and pressurized is sufficiently compressed in a short time, and the oil is extracted. becomes more efficient.

Furthermore, in the oil extraction device 10, oil is extracted from both the inner peripheral wall of the outer cylinder 28 and the outer peripheral wall of the inner cylinder 58 through the vertical grooves 40 and 60. Therefore, for example, compared to the case where oil is simply extracted from the outer peripheral wall of a storage container (cage), oil can be extracted in a shorter time and the efficiency of oil extraction is improved.

Furthermore, since the temperature of the outer cylinder 28 is raised by supplying hot air with the warm air sheet 78, it becomes easier to squeeze out fats and oils from the fats and oils raw material, and the efficiency of oil extraction improves.

[Effects of the Invention] As explained above, the oil extraction method and apparatus according to the present invention have the advantage of high oil extraction efficiency and improved workability.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an oil extraction device according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view of the main parts of the oil extraction device showing the parts used during temporary tightening, Fig. 3 is an exploded perspective view of the main parts of the oil extraction equipment showing the parts used during final tightening, and Figs. FIG. 9 is a schematic sectional view showing the operation of the oil extraction device. DESCRIPTION OF SYMBOLS 10... Oil extraction device, 16... Hydraulic cylinder 20... Piston rod, 28... Outer cylinder, 36... Lower receiving disk, 40... Vertical groove, 42... Oil recovery hole , 44... Outer tube filter 48... Temporary tightening pusher 56... Support plate, 58... Inner tube, 60... Vertical groove, 62... Oil collection hole, 64... Inner tube Filter 68...Final tightening cover 72...Cover holder, 78...Warm air sheet.

Claims (8)

[Claims] (1) An oil extraction method in which oil and fat raw materials are extracted by squeezing them with a predetermined pressure, in which the fat and oil raw materials are stored in an oil and fat raw material storage container, and the oil and fat raw materials are squeezed with a pressure smaller than the predetermined pressure. reducing the volume of the stored fat and oil raw material by squeezing, then adding and storing a new fat and oil raw material in the oil and fat raw material storage container without removing the reduced fat and oil raw material; Reducing the volume of the newly added and stored oil and fat raw material by compressing it with a pressure smaller than the pressing force, repeating the above process multiple times, and then extracting the oil by compressing it with the predetermined pressure. An oil extraction method characterized by: (2) Using a storage container that stores oil and fat raw materials inside and a vertical head that can be fitted into the storage container along the axis,
An oil extraction method for extracting the oils and fats contained in the oil and fat raw materials by squeezing the oil and fat raw materials, the method comprising: arranging an axial line member along an axis inside the storage container to form a part in which the oil and fat raw materials are not stored; An oil extraction method characterized by storing an oil or fat raw material in a portion other than the shaft member, and inserting the vertical head to squeeze the oil or fat raw material to extract oil. (3) The oil extraction method according to claim (2), characterized in that oil and fat recovery means are provided on the inner peripheral wall of the storage container and the outer peripheral wall of the axis member, and the oil and fat squeezed from these parts is collected. (4) Claims (1) and (2) characterized in that a hot air supply means is disposed outside the storage container that stores the oil and fat raw materials, and hot air is blown during compression to extract the oil. ) or the oil extraction method according to claim (3). (5) An oil extraction device that extracts the fats and oils contained in the oil and fat raw materials by squeezing them, comprising a storage container for storing the oil and fat raw materials, and a storage container that can be fitted into the storage container to squeeze the oil and fat raw materials, and the oil and fat raw materials can be squeezed. An oil extraction device comprising: a pressurizing means for adding and storing new oil and fat raw materials in the storage container without removing the oil and fat raw materials after squeezing the oil and fat raw materials. (6) a storage container that stores oil and fat raw materials therein; an axial line member that is arranged along the axis inside the storage container and forms a part where the oil and fat raw materials are not stored; and a shaft line member that is fitted inside the storage container along the axis. and a pressurizing means for squeezing the fat and oil raw material stored in a portion of the storage container other than the axis member. (7) Claim (6) characterized in that the oil collecting means is provided on the inner circumferential wall of the storage container and the outer circumferential wall of the axis line member and guides the fat and oil squeezed out from these parts.
) The oil extraction device described. (8) Claims (5) and (6) characterized in that a hot air supply means is provided outside the storage container that stores the fat and oil raw material and is capable of blowing hot air during compression. Or the oil extraction device according to claim (7).